15 relations: Apparent magnitude, Bright Star Catalogue, Camelopardalis, Constellation, Declination, Durchmusterung, Henry Draper Catalogue, Hipparcos, Light-year, Main sequence, Minute and second of arc, Right ascension, Smithsonian Astrophysical Observatory Star Catalog, Star system, Stellar classification.
The apparent magnitude (m) of a celestial object is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere.
The Bright Star Catalogue, also known as the Yale Catalogue of Bright Stars or Yale Bright Star Catalogue, is a star catalogue that lists all stars of stellar magnitude 6.5 or brighter, which is roughly every star visible to the naked eye from Earth.
Camelopardalis or the Giraffe constellation is a large, faint grouping of stars in the northern sky.
New!!: 7 Camelopardalis and Camelopardalis ·
In modern astronomy, a constellation is a specific area of the celestial sphere as defined by the International Astronomical Union (IAU).
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In astronomy, declination (abbreviated dec; symbol δ) is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle.
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In astronomy, Durchmusterung or Bonner Durchmusterung (BD), is the comprehensive astrometric star catalogue of the whole sky, compiled by the Bonn Observatory (Germany) from 1859 to 1903.
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The Henry Draper Catalogue (HD) is an astronomical star catalogue published between 1918 and 1924, giving spectroscopic classifications for 225,300 stars; it was later expanded by the Henry Draper Extension (HDE), published between 1925 and 1936, which gave classifications for 46,850 more stars, and by the Henry Draper Extension Charts (HDEC), published from 1937 to 1949 in the form of charts, which gave classifications for 86,933 more stars.
Hipparcos was a scientific satellite of the European Space Agency (ESA), launched in 1989 and operated until 1993.
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A light-year (abbreviation: ly), sometimes written light year, is a unit of length used informally to express astronomical distances.
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In astronomy, the main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness.
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A minute of arc (MOA), arcminute (arcmin) or minute arc is a unit of angular measurement equal to one-sixtieth of one degree.
Right ascension (abbreviated RA; symbol α) is the angular distance measured eastward along the celestial equator from the vernal equinox to the hour circle of the point in question.
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The Smithsonian Astrophysical Observatory Star Catalog is an astrometric star catalogue.
A star system or stellar system is a small number of stars that orbit each other, bound by gravitational attraction.
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In astronomy, stellar classification is the classification of stars based on their spectral characteristics.